So you ve got that bottom row of tile.
Tiling out of plumb walls.
Install the wall tile in a pyramid shape.
If this is the case you could remove the first course of tile and cut the board above the flange punch the board in and screw it.
Find the midline of the wall from ceiling to floor and mark it with a chalk line.
I hesitate to bring this point up but i think guess your walls are out of plumb because you capped the metal upturn flange of the tub with the cement board.
You will lay out your first tile directly on this line and your.
Hang a batten board to prevent tile slippage.
How to deal with out of plumb walls for tile.
How do we deal with that doing tile.
Tips for tiling a wall 1.
Measure the wall where you will place the tiles.
We are doing a remodel and have discovered the wall around a tub shower is out of plumb by 1 2 over 5 feet.
If this is not the case then forget i brought it up.
Do you stack the tile.